Tools needed?

  • Centos 6
  • Terminal

How we do it?

  • Notes

    • Make sure you have centos 6
    • This way is for Centos 6
    • For Centos 7, use yum install supervisor for easy ways

  • Prerequisites

    • epel-release
    • python-pip
    • python-setuptools
    • python-setuptools-devel

  • Overview

    • What is supervisor? supervisor is tools for process monitoring and controlling on linux. I mean it just like systemd, but supervisor are not built-in tools like systemd.
    • why we use supervisor instead of systemd in centos 6? because supervisor works on any distro, no need to be superuser to run process, easy manage process and group, on centos 6, there is no systemd, so why i share this tutorial because i got stuck on running process with that old OS.

  • Installing Prerequisites

    Before we installing supervisor, we need to install dependency tools first. Type this on your terminal.

    $ sudo yum install epel-release python-pip python-setuptoolsv python-setuptools-devel

  • Installing Supervisor Using PIP

    After installation above successful, we need to install meld3 version 0.6.7, we need to describe version of meld3, also version of supervisor. Why? New packages version may not be compatible for Centos 6. For sure i have try for new version and not work on my VM. We need to install this packages using pip

    $ pip install supervisor==3.3.4 meld3==0.6.7

    If permission error we need to run as sudo

    $ sudo pip install supervisor==3.3.4 meld3==0.6.7

  • Create Supervisor Configuration Path

    • First, we will get this path /etc/supervisor

    • Create configuration path

      $ sudo mkdir /etc/supervisor/conf.d

    • Inside of conf.d directory there will be the configuration file for controlling and managing process.

  • Modify Supervisor Configuration

    • Modify /etc/supervisord.conf

      $ sudo vi /etc/supervisord.conf

    • Replace all configuration with this

      [unix_http_server]
file=/tmp/supervisor.sock

[supervisord]
logfile=/tmp/supervisord.log
logfile_maxbytes=50MB
logfile_backups=10
loglevel=info
pidfile=/tmp/supervisord.pid
nodaemon=false
minfds=999999
minprocs=200

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
serverurl=unix:///tmp/supervisor.sock

[include]
files = /etc/supervisor/conf.d/*.ini

    • Run $ sudo supervisord for starting.

  • Example .ini Configuration

    • We will try to run node-exporter process using supervisor
    • Create file configuration inside /etc/supervisor/conf.d
    • Name it with node_exporter.ini
    • Add this configuration 
      [program:node_exporter]
command=/path/to/binary/node_exporter
directory=/path/to/additional/node_exporter/conf
process_name=%(program_name)s
numprocs=1
umask=022
priority=1
user=root
group=root
autostart=true
autorestart=true
redirect_stderr=true
stdout_logfile=/var/log/supervisor/node_exporter.log

References

  • http://supervisord.org/installing.html